On a two-lane road, you have just overtaken a large truck (A) in lane 2 from lane 1. You now want to move back into lane 2. Which TWO are correct? Select TWO
- Your car (blue) is in lane 1 with its right turn signal on
- Large truck (A) in lane 2 is behind you on the right
When changing lanes, you must not obstruct vehicles coming in that lane and must signal in advance with your turn signal (Articles 19(3) and 38(1) of the Road Traffic Act). Also recall that a heavy truck has a long stopping distance and that sudden braking other than to prevent danger is prohibited (Article 19(4)).
Answer: ①, ④
Explanation
When changing lanes you must not disrupt the normal travel of vehicles coming in that lane (Road Traffic Act Article 19(3)) and must turn on your turn signal in advance (Article 38(1)). A large truck's stopping distance is long because of its weight, so cutting in right in front of it and slowing creates a high risk of a rear-end crash; move back only when you are well ahead and can see the truck clearly in the mirror. Sudden braking other than to avoid danger is also prohibited (Article 19(4)).
Legal basis: 도로교통법 제19조 제3항·제4항, 제38조 제1항